Add driver supporting pin multiplexing on rk3066 platform.
Signed-off-by: Paweł Jarosz paweljarosz3691@gmail.com ---
Changes since v1: - updated to shifted masks - added nand support
Changes since v2: - none
Changes since v3: - none
Changes since v4: - updated driver to pinctrl full
drivers/pinctrl/rockchip/Makefile | 1 + drivers/pinctrl/rockchip/pinctrl-rk3066.c | 113 ++++++++++++++++++++++ 2 files changed, 114 insertions(+) create mode 100644 drivers/pinctrl/rockchip/pinctrl-rk3066.c
diff --git a/drivers/pinctrl/rockchip/Makefile b/drivers/pinctrl/rockchip/Makefile index fcf19f877a..7d03f8101d 100644 --- a/drivers/pinctrl/rockchip/Makefile +++ b/drivers/pinctrl/rockchip/Makefile @@ -5,6 +5,7 @@ obj-y += pinctrl-rockchip-core.o obj-$(CONFIG_ROCKCHIP_PX30) += pinctrl-px30.o obj-$(CONFIG_ROCKCHIP_RK3036) += pinctrl-rk3036.o +obj-$(CONFIG_ROCKCHIP_RK3066) += pinctrl-rk3066.o obj-$(CONFIG_ROCKCHIP_RK3128) += pinctrl-rk3128.o obj-$(CONFIG_ROCKCHIP_RK3188) += pinctrl-rk3188.o obj-$(CONFIG_ROCKCHIP_RK322X) += pinctrl-rk322x.o diff --git a/drivers/pinctrl/rockchip/pinctrl-rk3066.c b/drivers/pinctrl/rockchip/pinctrl-rk3066.c new file mode 100644 index 0000000000..8faba05a4a --- /dev/null +++ b/drivers/pinctrl/rockchip/pinctrl-rk3066.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2021 Rockchip Electronics Co., Ltd + */ + +#include <common.h> +#include <dm.h> +#include <dm/pinctrl.h> +#include <regmap.h> +#include <syscon.h> +#include <linux/bitops.h> + +#include "pinctrl-rockchip.h" + +static int rk3066_set_mux(struct rockchip_pin_bank *bank, int pin, int mux) +{ + struct rockchip_pinctrl_priv *priv = bank->priv; + int iomux_num = (pin / 8); + struct regmap *regmap; + int reg, ret, mask, mux_type; + u8 bit; + u32 data; + + regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU) + ? priv->regmap_pmu : priv->regmap_base; + + /* get basic quadrupel of mux registers and the correct reg inside */ + mux_type = bank->iomux[iomux_num].type; + reg = bank->iomux[iomux_num].offset; + reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask); + + data = (mask << (bit + 16)); + data |= (mux & mask) << bit; + ret = regmap_write(regmap, reg, data); + + return ret; +} + +#define RK3066_PULL_OFFSET 0x118 +#define RK3066_PULL_PINS_PER_REG 16 +#define RK3066_PULL_BANK_STRIDE 8 + +static void rk3066_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank, + int pin_num, struct regmap **regmap, + int *reg, u8 *bit) +{ + struct rockchip_pinctrl_priv *priv = bank->priv; + + *regmap = priv->regmap_base; + *reg = RK3066_PULL_OFFSET; + *reg += bank->bank_num * RK3066_PULL_BANK_STRIDE; + *reg += (pin_num / RK3066_PULL_PINS_PER_REG) * 4; + + *bit = pin_num % RK3066_PULL_PINS_PER_REG; +}; + +static int rk3066_set_pull(struct rockchip_pin_bank *bank, + int pin_num, int pull) +{ + struct regmap *regmap; + int reg, ret; + u8 bit; + u32 data; + + if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT && + pull != PIN_CONFIG_BIAS_DISABLE) + return -ENOTSUPP; + + rk3066_calc_pull_reg_and_bit(bank, pin_num, ®map, ®, &bit); + data = BIT(bit + 16); + if (pull == PIN_CONFIG_BIAS_DISABLE) + data |= BIT(bit); + ret = regmap_write(regmap, reg, data); + + return ret; +} + +static struct rockchip_pin_bank rk3066_pin_banks[] = { + PIN_BANK(0, 32, "gpio0"), + PIN_BANK(1, 32, "gpio1"), + PIN_BANK(2, 32, "gpio2"), + PIN_BANK(3, 32, "gpio3"), + PIN_BANK(4, 32, "gpio4"), + PIN_BANK(6, 16, "gpio6"), +}; + +static struct rockchip_pin_ctrl rk3066_pin_ctrl = { + .pin_banks = rk3066_pin_banks, + .nr_banks = ARRAY_SIZE(rk3066_pin_banks), + .grf_mux_offset = 0xa8, + .set_mux = rk3066_set_mux, + .set_pull = rk3066_set_pull, +}; + +static const struct udevice_id rk3066_pinctrl_ids[] = { + { + .compatible = "rockchip,rk3066a-pinctrl", + .data = (ulong)&rk3066_pin_ctrl + }, + {} +}; + +U_BOOT_DRIVER(rockchip_rk3066a_pinctrl) = { + .name = "rockchip_rk3066a_pinctrl", + .id = UCLASS_PINCTRL, + .of_match = rk3066_pinctrl_ids, + .priv_auto = sizeof(struct rockchip_pinctrl_priv), + .ops = &rockchip_pinctrl_ops, +#if !CONFIG_IS_ENABLED(OF_PLATDATA) + .bind = dm_scan_fdt_dev, +#endif + .probe = rockchip_pinctrl_probe, +};